REJ:2026.09.04.0001 clim.FR (Fringe Climatology) Rejected
It Rains Because the Washing Is Out: Household Line-Drying as the Controlling Moisture Source for Warm-Season Rainfall, with a Cluster-Randomised Trial in 3,214 Homes
Halvard Bekk, Perpetua Nwankwo, D. R. Culpepper & The Line-Drying Attribution Consortium
Comments: 7 pages, 3 figures, 0 reproducible results. Rejected in 33 minutes on Sep 4, 2026.
Abstract: It rains as soon as the washing goes out. The washing is the reason. A load hung outside releases about 2.1 kg of water into the air just above the ground, in the hours when that air decides whether a cloud will form, and nothing else people do puts water there. The total is trivial — four hundredths of one per cent of the seasonal moisture budget — and total water is not what governs convective initiation. Household drying can be read off the electricity meter: a wash cycle with no dryer cycle behind it is a load on a line. We reconstructed ten years of it for 1.42 million homes and tested it four ways. Clusters supplied with tumble dryers in a two-season cluster-randomised trial rained less than clusters left on the line. The same step appears wherever a right-to-dry statute commences, and again when a dryer breaks. Pooling the three, we attribute 0.36 of warm-season rain-hours over inhabited land to domestic drying (95% CI 0.32 – 0.41 ). Rain re-wets the line and the line is re-hung, so the mechanism is a loop; in the temperate maritime zone its gain is 1.07 . A loop with gain above one and a delay does not settle. Weather is not something that happens to the washing.